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But there's something missing in our understanding of what gravity is and how gravity works.
然而我們對引力的屬性和機(jī)理的認(rèn)識(shí)上還有所不足。
Getting to the bottom of the problem has vexed scientists as far back as the Ancient Greeks.
弄清問題的底細(xì)早，在古希臘時(shí)期就已經(jīng)困擾著科學(xué)家們了。
But in the late 1600s, in a small village in Lincolnshire,
但到了17世紀(jì)后期，在林肯郡的一個(gè)小村莊里，
the question of gravity was tackled head on by one of the granddaddies of modern physics.
引力的問題被現(xiàn)代物理之父之一迎面解決了。
This is the home of Sir Isaac Newton.
這里是艾薩克·牛頓爵士的故居。
Film about gravity-apple.
有關(guān)引力-蘋果的版本。
It's a cliche but the story goes that it was in this orchard that Newton was sat, thinking about the universe,
這是個(gè)老掉牙的故事了，但這故事?lián)f是牛頓坐在這個(gè)果園里，思考著宇宙，
and an apple fell on Newton's head, and got him thinking about what it is that makes the apple fall,
一個(gè)蘋果砸在了牛頓的頭上，使他考慮到是什么讓蘋果掉下來的，
what force pulls the apple towards the ground?
是什么力量把蘋果拉到地面上來的。
Newton suggested the apple falls because of a force of attraction that naturally exists between the apple and the Earth.
牛頓想到了蘋果掉下是由于吸引力，天然存在與蘋果與地球之間的吸引力。
It's this force that we know as gravity.
這就是我們所熟知的引力。
But Newton's real genius was not to just stop with the apple but to ask the question,
牛頓是個(gè)了不起的天才，不是僅停留在蘋果上，而是提出問題，
is the same force that causes the apple to fall here on Earth
造成蘋果掉到地面的同樣的力
also responsible for the movement of much bigger things out there in the cosmos?
也同樣引起宇宙間大得多的物體的運(yùn)動(dòng)嗎？
